Upgrade again - The popular and best valued Oppo BDP-83 to replace the Panasonic BD-35:
Both picture and sound quality improves by at least 20% and the most important is that I can use it as SACD and DVD-Audio player to my 2-channel system.
Yes I have once tested a cheap local EL84 tube AMP and the result is wonderful. BTW, I am satisfied with the Naim and see whether will upgrade to tube AMP later.